package netty.websocket;

import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.SimpleChannelInboundHandler;
import io.netty.handler.codec.http.websocketx.TextWebSocketFrame;

import java.time.LocalDateTime;

/**
 * Created by yu756 on 2020/1/7 14:37
 * <p>
 * TextWebSocketFrame 表示一个文本帧 frame
 */
public class MyTestWebSocketFrameHandler extends SimpleChannelInboundHandler<TextWebSocketFrame> {
    @Override
    protected void channelRead0(ChannelHandlerContext channelHandlerContext, TextWebSocketFrame textWebSocketFrame) throws Exception {

        System.out.println("服务器收到消息" + textWebSocketFrame.text());
        // 回复消息
        channelHandlerContext.channel().writeAndFlush(new TextWebSocketFrame("服务器时间" + LocalDateTime.now() + "" + textWebSocketFrame.text()));
    }

    // 当web客户端连接后触发该方法
    @Override
    public void handlerAdded(ChannelHandlerContext ctx) throws Exception {
        // longText 是唯一的   shortText 不是唯一的
        System.out.println("handler 被调用" + ctx.channel().id().asLongText());
        System.out.println("handler 被调用" + ctx.channel().id().asShortText());
    }

    @Override
    public void handlerRemoved(ChannelHandlerContext ctx) throws Exception {
        System.out.println("handler 被调用" + ctx.channel().id().asLongText());
        System.out.println("handler 被调用" + ctx.channel().id().asShortText());

    }


    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
        System.out.println("异常发生" + cause.getMessage());
        ctx.close();
    }
}


